Mac App Store

Mac App Store is the simplest way to find and download apps for your Mac.

To download CodeRunner from the Mac App Store, you need a Mac with OS X 10.6.6 or later. Learn More.


By Nikolai Krill

Open the Mac App Store to buy and download apps.


Edit and run code in any programming language with just a single click. With CodeRunner, It has never been easier to write and test code, run scripts, work with algorithms, or simply experiment with a new coding or scripting language.


- Edit and run code in AppleScript, C, C++, Java, JavaScript (Node.js), Lua, Objective-C, Perl, PHP, Python, Ruby, Shell or any other language you might have installed on your system
- Fully featured editor with tabs, syntax highlighting, great code completion, color themes, intelligent bracket matching and more
- Editable code presets for new documents eliminates the need to keep writing main functions etc.
- Built-in file browser for easy access to your source files
- Fully supported user input in programs, and the ability to run with command line arguments and predefined input sets
- Built-in timing of code execution
- Autosaving, Versions and Fullscreen
- Customizable run commands and compile flags, user-defined color themes, custom fonts, full encoding support, and much more

What's New in Version 1.3.1

- Retina graphics
- C# language presets
- Print function
- Key combo for switching between tabs
- General fixes and improvements


Screenshot 1
Screenshot 2
Screenshot 3
Screenshot 4

Customer Reviews

I love this app. Essential for my Computer Science classes.

The problems with v1.3.1 running under Snow Leopard are fixed in v1.3.2, which the developer kindly sent me after I emailed my concerns over my upcoming CS classes and a non-working CodeRunner app under Snow Leopard. He stated he was having problems getting Apple to approve v1.3.2 for release. Not sure why. It seems to work fine for me.

Those having problems under Snow Leopard could always upgrade to Mountain Lion, which should get v1.3.1 working again. I didn't want to do that because I love Snow Leopard... clearly the most stable version of OS X I've ever seen... and I've used them all from the initial release.

I just wanted to make everyone aware that a fix is done but the developer is having issues with Apple over its release. Keep the faith. This is a great app and a great developer. He usually responds promptly to my emails if I have a problem to report. I look forward to future development of this app. It's making my CS classes much less of a hassle.


As a computer science major, I use this app ALOT on mountain lion. I have used it through courses in C++ and JAVA. Its simple to use interface makes it very enjoyable to work with: simply open it, chose your programming language and type away. For those skeptical about whether or not it will suit your needs, I have used this app in advanced java data structures courses and it takes just about anything I throw at it, so maybe that will tell you something about it. Whether its comparable to a full flegged compiler or not is something I dont know, maybe I just havn't done advanced enough programming to see the difference. All that aside, once again, this little app is amazing. I reccomended it it to a handfull of my friends (who are also computer science majors), that love it and is all they use for their coding assignments/projects. Best 10$ ever spent.

This is THE app that is worth every penny!

I’ve purchaced probably far too many apps on through the app store, and regreted most of them. This app however is THE app that is worth every penny. It’s fast and versitie. I’ll admit I wasn’t expecting much, but what I got made it one of the most valuable coding apps I have. Having to pick up some skills in languages I may never use often enough to fully explore mid project, and learning more of a language without having to use up all available RAM is excellent. It’s great for using in classes too. I can set up simple programs quickly and run right away to help reduce time I would otherwise have to spend writing out long programs with full interfaces for everybody else to understand.

View in Mac App Store
  • $9.99
  • Category: Developer Tools
  • Updated:
  • Version: 1.3.1
  • Size: 1.5 MB
  • Language: English
  • Seller:

Compatibility: OS X 10.6 or later

Customer Ratings

Current Version:
All Versions: